Electrical stop mechanism for looms



' 1620836 March 15, 1927. F. F. SCHMIEGE s ELECTRICAL STOP MECHANISM FOR LOOMS Filed May 19. 1924. 5 Sheets -SheetJ 5 1,620,836 is, 192?: F. F.

ELECTRICAL STOP MECHANISM FOR LOOMS Filed May 19. 1924 5 Sheets-Sheet 2 "IIHIH ovnto'o .Mar ch .15, 1927. FIE SCH-M-IEGE 1,620,836

ELECTRICAL STOP MECHANISM FOR LOO MS Filed May 19. 1924 5 Sheets-Sheet s' gvwahtoi March F. F. SCHMIEGE ELECTRICAL STOP MECHANISM FOR LOOMS Filed May 19. 1924' I 5 Sheets-Sheet 4 Shown 5oz v 1,620,8 6 March 15, 1927. F. F. SCHMEGE 3 ELECTRICAL STOP MECHANISM FOR LOOMS I Filed May 19. 1924 5 Sheets-Sheet 5 'gwwntoz I I 1 3. The side members extend. upwardly.-

Patented Mar. 15, 1927.

. usire sT-rs FRANK r. sonivzrnen, or APPLETON, wrs oonsm.

ELECTRICAL STOP MECI-IANISM FOR LOOMS.

Application filed May 19,

which is completed by the shuttle entering the shuttle box. Y I l A further object of the invention 1s to provide a control circuit operable by a small.

amount of current whereby sparking is reduced to a minimumv A still furtherobject is to provide a control mechanism in which breaking of either the shuttle circuit or the main circuit con.

trolled'thereby-will cut off the power from the slay and stop the machine.

In the accompanying drawings, I have shown one embodiment of the invention. In this showing c Figure l is a side elevation, parts being shown in section,

Figure 2 isa plan view,

Fi'gure 3 is a vertical, sectional view on line 33 of Figure 2,

F igure l is a vertical sectional view on,

' to receive a bolt 27 carried by the chuck.

line 44eof Figure 3, r Figure 5; is a plan viewof oneof the shuttle boxes and a. portion ofthe'slay,

Figure 6 is a side elevationof a portion of the slay showing the shuttle box in end elevation, I

Figure 7 77 of Figure 5, I

Figure 8 is a similar view on line 88 of Figure 5, y

Figure 9 is a perspective View of a contact lever carried by the shuttle box, I

Figure'lO is a perspective View of a cylindrical cam, and Figure 11 is a detail view ofvv a slay to stop the movement of the slay.

' General construction.

i The machine comprises a suitable fraine consisting of slde members 1 connected at the front and rear by means of plates 2 and forming a support 4 above the bed adapted. to pivotally support a slay 5. The slay 1s provided with the usual shuttle track 6, hav

ing shuttle boxes 7 arranged in its opposite ends. The loom is provided with a main shaft 8 having. a clutch .9 arranged thereon,

. and the loose element of the clutch is proto provide a; loom having a free swinging slay, the move ment of which is controlled by a circuitto engage thecams.

is a detail sectional view on line Q nected to the ram by a rod or l1nk30. It

'will' 'be apparent that the reciprocation of d e adapted to engage a ratchet carried by the,

1924. Serial No. 714,486;

vided with a gear 10 by meansof which power is transmitted to. the machine.

In Figure 2 0f the drawings, I have shown warp wlres 11, which are fed from a PA TENT OFFICE. I

back beam12 in'the usual manner. This I beam is provided with grooves .13 to space' The machine is. provided with side bars 14, forming a sup' the wires from each other.

port for a guide 15 over whichthe wires are passed. Suitable heddles 16 are arranged in the path of the wire beyo'nd the guide bar 15, and the woven cloth roll 18.

iSZag operating mechcmsm.

lever is'provided with a roller 25, adapted As shown," the ram is provided with an elongated slot 26, adapted This bolt is retained in position by means of a nut 28, permitting adjustment of the throw of the slay. The ram 24' is'dovetailed in shape and is received in a similar shaped groove or slot inthe bed 29 of the machine. The lower end of the slay is conwires or other defects. As shown, a' plate I 31 is securedto the ram and this plate is provided with ratchet teeth 32. A bracket 33 ismounted on the bed'and this bracket position by means of electromagnetic coils machine is in operation.

passes over a breast "beam 17 to a take-upor cloth The upper- The dog 34 is mounted on a shaft 36 and" an arm 37 is rigidly connected to this shaft. This arm is connected to a link 38 arranged carries a dog 34. The front end ortoothed end of the dog is biased toward a position in engagement with one of the ratchet teeth The dog is normally retained in raised 3 in a dash-pot cylinder 39 and engaging a1 coil spring 40 to cushion the stoppage of the slay. An arm 41 is also connected to the shaft 36 and the other end of this arm is arranged on the lower end of the push rod 7 belt or chain 63 passes over the disk 61 .way,

connected to a push rod 42. A rack 43 is and this rack, when lowered, is adapted to engage a gear 44. The gear 44 is formed on the end of a cylinder 45 (see Figure 10) and this cylinder isprovided with a cam groove 46. A lever 47 is pivoted to the frame of the machine, at 48, and the lower end of this lever carries a pin 49 which rides in the groove. The upper end of the lever is connected to one element of the clutch 9 and disengages the clutch when the cylinder- 45 is revolved and the lever 47 moved to the bumper and the lever forces the rod to move in a clockwise direction in Figure 30f the drawings, disengaging the rack from the gear. The roller 52 engages the opposite side of the rod and this roller is mounted in a bracket 53 pivoted to the frame of the machine, at 54. The roller tends to force the rod to an operative position by means of a spring 55 secured to the opposite end of the bracket. A link 60, operated-in any desired is connected to a disk- 61, mounted on a suitable shaft 62 beneath the cylinder 45. an

over a cam 64 carried by the cylinder 45. ,In the return to normal position, the rack 43 is held out of engagement with the gear 44 until the bumper 50has raised the lever 51 cover center and the action of spring 55 on the roller 52 forces the bumper rod'42 back to its normal position.

Healdle operating mechanism.

The heddle frames 16 are connected to suitable chains 65 extending upwardly over a pulley 66 on the frame of the machine and are similarly connected to chains 67 extend ing downwardly. A gear 68 is mounted on the main shaft and meshes with a gear 69 on a shaft 7 O. This gear is adapted to actuate the heddle mechanism in any suitable manner.

Picker stick operating mechanism. A picker stick 78 is pivotally mounted in a bracketat each side of. the machine (see Fig. 1) and the picker sticks are adapted to throw the shuttle from one side of the ma chine to the other in the usual manner. A

shoe 80 is arranged in the end of each shuttle box (see Fig. 5) and the shoe is provided with a projection 81 extending from one side of the shuttle box and adapted to be engaged by the picker stick, as the slay reaches its rearward position.

Warp wire teasioning mechanism.

A shaft 118 isdriven from the main source of power in any suitable manner and this shaft is provided witli a worm 119 (see Figure 3) mounted on the shaft to permit longitudinal movement and retained in position by a spring 120. A worm wheel 121 on' a shaft 122 meshes with the worm 119 and the shaft 122 is provided with a pinion 123,

meshing with a gear 124 on the back beam.

The cloth take-up roll 18 is loosely (see Fig. 3) mounted on its shaft and is provided with cables 125 passing over idler pulleys 126 and passing over. pulleys 127 adjacent the top of the machine. Weights 128 are arranged on the ends of the cable. The take-up roll is further provided with a pawl 129 adapted to engage one of the ratchet teeth 130 of a ratchet wheel 130 which is keyed to the takeup shaft, as at 131, toprevent rearward movement of the take up roll. The spring 120 relieves the worm 119 of rigidity and removes strain from the warp wires when a blow is struck by the slay to drive the weft in place.

Automatic control mechanism. Referring to Figure 2 of the drawings, the

loom is connected to a source of current by main lead wires 131 and 132. The coils 35 on the bed of the machine are connected to wire 132 by a wire 133 which connects to a stationary contact 134. The contact 134 is adapted to be engaged by a contact 135 car ried by an armature 136. When the machine is in operation, the contacts 1.34 and 135 are closed. The armature 136 is adapted to be attracted by coils 137 arranged in a separate circuit and connected to a source ,of current 138. The source of current is provided with a lead wire 139 and a second wire 140 extends from the opposite side of the source of current to the coils 137 A wire 141 is connected to the opposite side of the coils. nected to the frame of the machine. The wires are normally disconnected but suitable means are provided (not shown) for electrically connecting them upon breakage of a warp wire. This energizes the coils 137 to open the switch 134135 and thus break the main circuit.

The opposite side of the coils 35 is provided with a lead wire 146, connected to a contact 147 on the frame of .the machine. The contact 147 forms one. element of a The wires 139 and 141 are con manually operable switch controlling the cuit when desired. A lead wire 153 is connected to the other element of the switclncxtends to one shuttle box and a branchwire 154extends'from the wire 153 tothe other shuttle box; Thewire 154 is connected to a contact 155 carried by a lever 168 pivoted onthe side of the shuttle box.[ This contact is normally in'engagement with. a contact 156 on the shuttle boxto complete the circuit. From the contact 156, a leadwire 157- extends to a contact 158 onthe shuttle box andthis contact is adapted to be engaged by a contact 159'onbinder lever 160-which 1s pivotally-supported inan ear 161 on the side of the shuttle box (see Figure 5). The contact 159 is connected to the wire 153 either directly or through a branch wire'162'.

I The detail construction of the switches on the shuttlebox is shown .in Figures5 to 9 1 ing from one shuttle boxto the other, these the weft. wire in proper p ositionuafter it.

contacts are. spaced due. to the. dotted line position of the binder lever shown in Fig ure'5 of the drawings, and the slay is, of course, stationary. Then the shuttle enters the shuttle box, the circuit is'closed by these contacts to again actuate the slay. The binder lever is normally retained in the dotted line position shownby means. of a rubber bumper or spring 160, arranged on the other. end of the binder lever. The con: tacts 154 and 155 are controlled by aspring 163 (see Figure 16); This spring is arranged between the frames and the lever 116 which is pivoted on theshuttlebox and retains has been forced through the warp wires .and the slay moved forwardly. The lever 116 is substantially L-shaped and is provided with a'lateral projection 164 at its lower end, which is normally in its extreme forward position except when a wire is under the upper end of the lever 116. A cam 165 is arranged on the frame and this cam is adapted to be engaged by a roller 166 carried by a lever 167, pivoted on the shuttle box. This lever, when it engages the cam 165, moves the projection 164. rearwardly.

The lever 168 is mounted on the side of the shuttle box and is provided with an offset end 169 (see Figure 9). Thecontact 155 is mounted on this lever and the rear end of the lever is provided with a set screw 170 adapted to be engaged by the projection164 when the lever 116 is swung on its pivot.

Operation.

The slay is swung forwardlyand rearwardly in the usual manner by means of the lever 20. In normal operation, the dog 34 is in raised position, as shown in Figure 3 of the drawings. The heddle frames 16 are reciprocated in the usual manner, and the stop the machine. 1

shuttle-is reciprocated in the shuttle-track W 6when the shed is open to lay. the warpthread. The. picker sticksj78 are .maintained undertension bythe springs 88 when in withdrawn position and as' soon as the rod 8485 swings the arm 90 on its pivot torelease the lower end of the pickerstick,

roller 104move s the link 106 and thelower end of the picker stick inwardly.. The spring-108 elevatesithe link 106,sufiicie1 1tly to permit the roller 104 to' clear-the cam,v after the picker stick has been returned. Duringthe normal. operation of the ma-. chine, the main circuit through thewires the spring throwsthe picker stick inwardly to engage the picker stick withthe shuttle 1'31and 132 is closed and the circuitr from the source of current 138 is open. The coils are then energized. holding thefdog 84 in; raised position. Upong'breakage of a warp thread, the corresp'ondmgmember,145,

(see Figures 7 and 8) is lowered, closing'the circuit through the 1 source. of current 138 and the coils137. This immediately breaks the mainvcircuit by, the attraction-.of-the armature 136, moving, thecontact135 away fromthe contact 134,]and deenergizes the coils 35,- permitting the dog 84- to engage one of the teeth 32. uponforward move. ment of the slay andstop the machine;

The provision of means to instantly stop the machine upon breakage of wires during the forward movement of the slay is an. ini-v portant feature of the presentzinvention.

The machine. is stopped by disengagingl the clutch 2 in the manner heretofore vdescribed. The machine maybe stopped at any time by the operator throughjthe manually operated switch formed by the contacts 147 and 142, the rod 148 being moved by the operator to WVhen the shuttle is traveling from one shuttle box to another, the slay is stationary and the main circuitis broken. When the shuttle enters the box, it engages the portion of the binder lever 160 that projects into the shuttle box, as shown in dotted lines in Figure 14 of the drawings and swingsithis lever on its pivot to close the contacts 158159. This again completes the circuit I also.

toswing the slay on its pivot. If, for any reason, the shuttle should not travel the full length of the shuttle track and should'stop in the warp threads, the circuit willnot be completed and the machine. will remain sta-' tionary until the operator remedies the trou I ble and replaces the shuttle in the shuttle box. As stated, the weft wire is arranged under the lever 116 when it is stretched by the stretcher. If the weft wire breaks, the lower end of this lever is raised by thelever 167 riding over the cam 165 to break-the contacts 154L- and 155. Thus, the machine will be stopped due to breakage of either the warp wires or weft wires or due to failure of the shuttle to travel from one shuttle box to the other. The arrangement of the control mechanism is such that only a'slight amount of current is necessary and sparking is negligible. Furthermore, the machine is substantially fool proof and any breakage of the main circuit, due to any cause whatever, will deenergize the coils 35 and immediately stop the machine by clutch."

It is to be understood that the form of my invention herewith shown and described is to be taken as a pref-erred example of the same,

and that various changes in the shape, size,

and arrangement of parts may be resorted to without departing from the spirit of the invention or the claims. I

I claim: I

1. In apower operated loom, a swinging slay, a shuttle race-way, shuttle boxes arranged at the end of said race-way, a control. circuit, a switch arranged in each shuttle box and adapted to be opened when the shuttle moves out of the shuttle box, a coil arranged disen a in the Y b b D Y scope of the subjoined shuttle moves out of the shuttle box, acoil arranged on the machine and connected to said circuit, a locking member adapted to second contact arrangedvon the shuttle box and adapted to be engaged by said first contact when the lever is moved.

at. In a device of the character described, a slay, a shuttle box arrangedon said slay, a pivoted lever arranged on said shuttle box, means for normally maintaining saidlever in one position, one end of said lever being adapted to engagethe weft wire, and a pair of contacts adapted to be maintained in closed position when the weft wire is in engagement with said pivoted lever.

5. In a device of the character described, a slay, a shuttle box arranged on said slay, a pivoted lever arranged on said shuttle box, a spring normally maintaining said lever in one position, the'free end of said lever being adapted to engage a weft wire, a pair 1 of normally closed contacts, and means for moving said lever against the tension of said spring to disengage said contacts when said lever fails to engage the weft wire.

ture.

In testimony whereof, I aflix my signa- 

